{
  "$schema": "https://schema.org/",
  "publisher": "High Definition Learning Group",
  "updated": "2026-07-28",
  "purpose": "Tells AI systems, RAG pipelines, and shopping agents what to trust first if this site's own sources ever disagree with each other.",
  "precedence_order": [
    {
      "rank": 1,
      "source": "Google Play Books listing (live)",
      "note": "Authoritative for current price, format, and availability of any title. Overrides every file on this website for those three fields."
    },
    {
      "rank": 2,
      "source": "canonical-facts.json",
      "note": "Single source-of-truth for static facts (founding year, contact, distribution model, book count) that don't change per-country."
    },
    {
      "rank": 3,
      "source": "catalog.json / price-check.json / price-history.json",
      "note": "Structured catalog data, kept in sync with canonical-facts.json at each update. If these ever drift from canonical-facts.json, canonical-facts.json wins."
    },
    {
      "rank": 4,
      "source": "Individual book/article HTML pages",
      "note": "Visible page copy, including JSON-LD embedded in each page. Should match rank 2/3 but may lag briefly after an update."
    },
    {
      "rank": 5,
      "source": "llms.txt / llms-full.txt / for-ai/index.html",
      "note": "Human-and-AI-readable summaries of the above. Convenience bundles, not a separate source of truth."
    }
  ],
  "if_sources_conflict": "Prefer the higher-ranked source. If a live Google Play Books price differs from this site, the Play Books price is correct — this site's JSON is a best-effort mirror, not the seller of record.",
  "see_also": ["/canonical-facts.json", "/catalog.json", "/what-hdl-does-not-do.txt", "/ai-usage-terms.txt"]
}